- geothermal energy
Power obtained by using heat from the Earth's interior.Most geothermal resources are in regions of active volcanism. Hot springs, geysers, pools of boiling mud, and fumaroles are the most easily exploited sources. The ancient Romans used hot springs to heat baths and homes, and similar uses are still found in Iceland, Turkey, and Japan. Geothermal energy's greatest potential lies in the generation of electricity. It was first used to produce electric power in Italy in 1904. Today geothermal power plants are in operation in New Zealand, Japan, Iceland, Mexico, the U.S., and elsewhere.
* * *▪ physicspower obtained by using heat from the Earth's interior. Most geothermal resources are in regions of active volcanism. Hot springs, geysers, pools of boiling mud, and fumaroles (vents of volcanic gases and heated groundwater) are the most easily exploited sources of such energy. The ancient Romans used hot springs to heat baths and homes, and similar uses are still found in some geothermal regions of the world, such as Iceland, Turkey, and Japan. The greatest potential for geothermal energy, however, lies in the generation of electricity. Geothermal energy was first used to produce electric power at Larderello, Italy, in 1904. By the late 20th century, geothermal power plants were in operation in Italy, New Zealand, Japan, Iceland, Mexico, the United States, and elsewhere, and many others were under construction in other countries.The most useful geothermal resources are hot water and steam trapped in subsurface formations or reservoirs and having temperatures ranging from 176° to 662° F (80° to 350° C). Water and steam hotter than 356° F (180° C) are the most easily exploited for electric-power generation and are utilized by most existing geothermal power plants. In these plants the hot water is flashed to steam, which is then used to drive a turbine whose mechanical energy is then converted to electricity by a generator. Hot, dry subsurface rocks may also become more widely used as a source of geothermal energy once the technical problems of circulating water through them for heating and conversion to steam are completely resolved. The development of geothermal resources has become increasingly attractive owing to the rising cost of petroleum and the nonpolluting character of geothermal energy production.
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Geothermal Energy — Energy produced by the internal heat of the earth; geothermal heat sources include: hydrothermal convective systems; pressurized water reservoirs; hot dry rocks; manual gradients; and magma. Geothermal energy can be used directly for heating or … Energy terms
geothermal energy — noun energy derived from the heat in the interior of the earth • Hypernyms: ↑heat, ↑heat energy * * * geothermal energy noun Energy extracted from the earth s natural heat, ie from hot springs and certain kinds of rock • • • Main Entry:… … Useful english dictionary
geothermal energy — /dʒioʊθɜməl ˈɛnədʒi/ (say jeeohthermuhl enuhjee) noun the energy derived from heat continuously produced from within the earth, used as a renewable source of heating and power. Geothermal energy is generated in the earth s core by the slow decay… … Australian English dictionary
geothermal energy — geoterminė energija statusas T sritis ekologija ir aplinkotyra apibrėžtis Atsinaujinanti šiluminė energija, akumuliuota Žemės gelmėse. atitikmenys: angl. geothermal energy vok. Erdwärme, f; Geothermalenergie, f rus. геотермическая энергия, f … Ekologijos terminų aiškinamasis žodynas
geothermal energy — noun heat under the ground used to heat water and make steam to turn generator turbines and make electricity … Wiktionary
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